Commitments and Contingencies (Purchase Obligations) (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Commitments and Contingencies Disclosure [Abstract]
Purchase obligations		$ 12,100,000
Losses on inventory purchase commitments	$ 2,455,000	$ 0	$ 0